Update 1: jlwjlg noticed the rollerball pens are cheaper at Officeworks. $10.98 for 12. Black also available.
Update 2: Sold out from Amazon AU. Available for the same price now from Amazon US via AU.
Uni-Ball Jetstream 101 Ball Point Pens, Bold Point, Blue Ink pack of 12. Great pens.
Although I prefer the black ink 0.7mm, this is still a good price for good pens.